BMC Pregnancy and Childbirth

Table 4 Hyperemesis gravidarum severity groups and placental measures

From: Hyperemesis gravidarum and placental dysfunction disorders

	Values (SD)	Crude model		Adjusted model^a
		Coefficients (95% CI)^b	p	Coefficients (95% CI)^b	p
Placental weight (g)^c
No HG	536 (145.2)	Reference		Reference
Mild HG	530 (102.3)	-5.98 (-42.92; 30.95)	0.75	-6.05 (-41.25; 29.15)	0.74
Severe HG	547 (98.4)	10.73 (-126.91; 148.38)	0.88	47.76 (-97.62; 193.14)	0.52
PW/BW ratio^c
No HG	0.18 (0.05)	Reference		Reference
Mild HG	0.18 (0.05)	0.001 (-0.01; 0.01)	0.89	0.002 (-0.01; 0.02)	0.72
Severe HG	0.19 (0.05)	0.02 (-0.03; 0.06)	0.54	0.04 (-0.01; 0.09)	0.15

Abbreviations: CI confidence interval, HG hyperemesis gravidarum, PW/BW ratio placenta-to-birthweight ratio, g grams
^aAdjusted model: adjusted for socio-economic status (as reflected by income), smoking status, gravidity, maternal age and pre-pregnancy BMI
^bResults are expressed as linear regression coefficients (95% CI)
^cMultiple pregnancies, stillbirths and miscarriages were excluded from the analyses

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